Leah's confession.

"No..." Leah stands up.
"What?" You stop in the act of bending to grab your boxer briefs.
"No...you don't have to go, Mr. Sinclair." She's really eyeing you now. "In fact, you two...you can..."
Riley looks at you, confused, over her shoulder.
Leah sits down in the chair by her computer desk. Her lips are parted, and her chest is heaving. "Just pick up where you left off...before I came in..."
"What?!" Riley looks incredulous. You feel a bit dazed yourself.
"Well, sweetie. As long as secrets are coming out, you aren't the only one who's had a crush on Mr. James Sinclair." She giggles. "I've been jilling myself off to your dad since junior high, Ry."
Riley looks totally flabbergasted.
"I mean it..." Leah's eyes are taking you in, hungrily. "I had to cut my trip short by two days because of my dick boyfriend getting arrested for blow." She pulls up the hem of her dress, exposing her panties. There's already a faint wet spot. "I'm horny and frustrated, and down for whatever." She looks at Riley. "Go ahead... don't mind me..."
Riley looks at you, biting her lip. She clearly wants to keep going, but the whole situation just got a bit more strange.
"It's up to you, Riley." You say. This is already way too surreal for you. Your just going to let whatever happens, happen.
Riley pushes the door to the bedroom closed, and peels off her tank top, tits popping free.
"Yes......" Leah hisses, getting a hand down into her panties. Her eyes are locked on you, waiting.
"OK, then..." you nonchalantly let the towel drop, and Leah's eyes are locked on your swinging cock. Her lips part, and her hand starts to move faster.
"Damn... if you were my daddy, I'd probably fuck you anyway, too." Riley gives a little protesting noise, but Leah just laughs. "Come on, Riley... just...look at him."
With a look of... petulance? Riley stalks over to you, dropping to her knees to put your cock in her mouth, wasting no time in getting you back to where you were before Leah got home. You moan and rub her head, but your eyes are held by Leah's. She licking her lips, shlicking and rubbing one breast through her dress. She lifts up momentarily to shed her panties down one leg, and then hooks one knee over the arm of the chair, giving you a nice view as she pumps two fingers into her pussy with lust in her eyes.
Riley grunts, going deeper, and you look down to see her eyes, looking up at you with... anger? You stroke her hair.
"Riley... what did daddy teach you about sharing?" Leah's chuckle is musical, as Riley pops off your cock to protest.
"Daddy! No...." she whines.
"Riley! I didn't raise you to be a whiny baby." You take her chin in your hand. "What do you do when your friend wants something of yours?"
"....share, daddy." She sounds grumpy about it, but she's also smiling.
"Good girl." you lay down on the bed. "Bring your friend over here, and show me that you know how to share."
"Yes, daddy."